| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adj] practice for | 27 |
|
| 2 | it is common practice [prep] | 13 |
|
| 3 | it be common practice for | 9 |
|
| 4 | it [be] common practice for | 9 |
|
| 5 | it [is] common practice for | 6 |
|
| 6 | [pron] is common practice for | 6 |
|
| 7 | it is common [noun] for | 6 |
|
| 8 | it is common practice for | 6 |
|
| 9 | [pers pn] is common practice for | 6 |
|
